Emergence Period Research Articles

P-1953. Youden’s Index Ensures the Accuracy of Wastewater-based Surveillance of SARS-CoV-2 Variants by Allele-Specific RT-qPCR or Genomic Sequencing

Abstract Background Clinical genomic surveillance is the gold standard for monitoring SARS-CoV-2 variants globally, but as the pandemic wanes, reduced testing increases the risk of missing the emergence of variants of concern or failing to accurately follow their trajectory in populations. Wastewater-based genomic surveillance (WWS) that estimates variant frequency based on its defining set of alleles derived from clinical genomic surveillance has been successfully implemented. However, this method has its challenges, and allele-specific (AS) RT-qPCR that monitors a single, variant-defining, allele is used as a complementary method for estimating variant prevalence. Demonstrating equivalent performance of the methods is a prerequisite for their continued application of WWS in current and future pandemics.Figure 1:Comparison of AS-RT-qPCR and amplicon-based sequencing methods for estimating SARS-CoV-2 variants frequency in wastewaters; A) N: D63G and B.1.617.2 haplotype, B) N: P13L and B.1.1.529 haplotype, C) S: H69+/V70+ and BA.1 haplotype, and D) S: H69-/V70- and BA.2 haplotype. Methods We compared single-allele frequency estimation using AS-RT-qPCR, to single-allele or haplotype frequency estimations derived from amplicon-based sequencing to estimate variant prevalence in municipal wastewater collected during emergent and prevalent periods of Delta, Omicron, and two of its sub-lineages in Ottawa, Canada.Table 1:Youden index of targeted alleles (N: D63G, N: P13L, S: H69+/V70+ and S: H69-/V70-) in wastewaters using AS-RT-qPCR and sequencing as well as haplotype of each variant. Results We found that all three methods of frequency estimation were concordant and contained sufficient information to describe the trajectory of variant prevalence in wastewater across time (Figure 1). We further evaluated the accuracy of these methods by quantifying the diagnostic performance (i.e., method accuracy expressed as Youden’s index), based on available clinical genomic prevalence data. Youden’s index confirms the accuracy of methods employed for variant frequency estimation in wastewater (Table 1), but accuracy of each method can be influenced by different factors. Conclusion WWS emerges as a crucial epidemiological tool for monitoring infectious disease in the population during the COVID-19 pandemic. This study validates the accuracy of WWS in SARS-CoV-2 variants monitoring using AS-RT-qPCR or sequencing methods and provides comprehensive perspective for implementing public health interventions against infectious diseases. Disclosures All Authors: No reported disclosures

Fitness costs associated with laboratory induced resistance to chlorpyrifos in Spodoptera litura

Spodoptera litura (Fabricius) is a major polyphagous pest of global relevance due to the damage it causes to various crops. Chlorpyrifos (CPF) is generally used by farmers to manage S. litura, however, its widespread use has resulted in the development of insecticide resistance. Therefore, in the present study, a population of S. litura was exposed to CPF for eight generations under laboratory conditions, resulting in a 2.81-fold resistance ratio compared with that of the unselected laboratory population (Unsel-Lab). The exposure of Unsel-Lab and CPF-Sel populations to their respective lethal and sublethal concentrations reduced larval survival, adult emergence, and prolonged development period, and induced morphological deformities in adults. The reproductive and demographic parameters were also significantly lowered in the treated larvae of both populations at higher concentrations. Moreover, hormetic effects on fecundity, next-generation larvae, the net reproductive rate (R0), and relative fitness (Rf) were observed at lower sublethal concentrations of CPF, specifically at the LC5 of Unsel-Lab and the LC10 of the CPF-Sel population. Sublethal exposure to CPF negatively affected the biological and demographic parameters in both populations, although the impact was more prominent in the CPF-Sel population. The relative fitness of the CPF-Sel was also greatly reduced at the LC50 (0.28) compared to that of the Unsel-Lab population. However, only a marginal trade-off of insecticide resistance evolution was observed in the CPF-Sel population in the absence of insecticide selection pressure. These results provide useful information for devising improved pest management strategies for CPF resistance in S. litura.

PUBLIC CREDIT GUARANTEES AND BANKING SYSTEM: THE ITALIAN CASE DURING COVID-19 EMERGENCY

This paper presents an in-depth examination of the impact of public support to small and medium Italian enterprises during the COVID-19 pandemic. The country’s banking system was entrusted a key role in implementing extraordinary measures of financial support, such as moratoria and public guarantees. This support prevented the sudden drop in revenues and cash flows — caused by the pandemic and the related severe restrictive measures adopted by the Italian Government — from compromising the liquidity and solvency of a huge number of firms, thus preventing the occurrence of a chain of insolvencies, which would have seriously deteriorated Italian economy. To perform these tasks, Italian banks had to cope with commitments which severely tested their organizational structure, due to a large number of operations and the complexity and urgency these tasks entailed, especially in the first months of the emergency period. The study, in a five-year perspective, analyses — in terms of intensity and pervasiveness — the set of such initiatives, both at the entire Italian banking system level and at the specific cooperative banks level, the latter characterized by greater proximity to potentially more fragile customers. The aim of this work is to verify whether the effectiveness of the Italian banking system in this key role of accomplishing the transmission of economic policy decisions, aimed at promoting and sustaining real economy during a particularly difficult period, can be confirmed.

Impact of the COVID-19 pandemic on the learning engagement of racially diverse undergraduate students in remote learning

ABSTRACT The COVID-19 pandemic caused a global shift to remote learning and at the same time presented challenges to implementing this form of learning. However, not many studies have been conducted on the impact of the COVID-19 pandemic on students from racially diverse backgrounds in remote learning. To extend our understanding of this topic, this qualitative study explored the impact of this pandemic on the learning engagement, perceived by racially diverse students in remote learning. Data were gathered through semi-structured interviews with 40 undergraduate students from a university in Northeastern United States, analysed following an inductive analysis approach, and interpreted through the lens of Self-Determination Theory. Findings indicated that the COVID-19 pandemic impacted diverse students regarding psychological and emotional stress. Also, insufficient support in remote learning engagement, lack of digital and technical resources and a digital divide were identified as challenges that emerged during the pandemic remote learning period. However, the use of digital social media tools helped students navigate through the challenges of the COVID-19 pandemic to promote their learning engagement in remote learning. The results suggest that higher education institutions should develop instructional resources that can effectively facilitate teaching and learning to enhance students’ learning engagement during disasters and emergency periods.

Community-driven Waste Management: Insights from an Action Research Trial in Yogyakarta, Indonesia

Background Yogyakarta is in a waste emergency period. Waste management poses a significant challenge in urban areas, necessitating innovative and sustainable solutions. This article explores the Community-Based Waste Management (CBWM) approach implemented in Yogyakarta City, Indonesia, shedding light on valuable lessons from this initiative. Yogyakarta City's experience is a case study for understanding the effectiveness of involving local communities in waste management efforts. Through participatory programs, residents have been empowered to actively contribute to waste reduction, recycling, and proper disposal practices. Objective This study seeks public health-oriented household waste management options and increases public awareness about trash management while keeping public health in mind to overcome Yogyakarta's waste emergency. Methods This study employs an action research design mixed with qualitative research. Participants were members of society, government authorities (environmental and health offices), and the Yogyakarta Provincial and City Health Offices. For the trial method, participants comprised four cycles utilizing a standard random sample procedure. An in-depth interview was conducted to evaluate the procedure, and questionnaires were used to determine performance indicators for the procedure. Results Community-based action research guarantees that waste management is improved by approaching it from a public health standpoint. Waste management innovations include implementing environmental sanitation, clean and healthy lifestyles, implementing occupational health and safety concepts, sorting organic and inorganic waste, as well as innovations in household waste management infrastructure. Conclusion Innovation in waste management considers that public health is necessary for society. Innovation refines waste processing techniques that were previously in use. This idea is suitable and adaptable to the circumstances of Yogyakarta City residents.

Comprehensive Review of Integrated Approaches to Cooperation and Collaboration in Emergency Response and Crisis Management

There needs to be positive coordination and cooperation between governmental and non-governmental organizations, private businesses, and the population at large, especially during an emergency period. This paper will provide a detailed review of integrated approaches to crisis management, emphasizing the importance of establishing lines of communication and interdependency in crisis management. The review of the current topic focuses on identifying the various success and failure strategies of the recent worldwide crisis while stressing multilateral and interdisciplinary cooperation. Drawing from case studies and existing literature, this paper seeks to provide lessons learned for improving preparedness, response, and recovery during crises in the future.

“It takes a lot of sisu to get through it”- managerial experiences of facing adversities during pandemic

ABSTRACTPurposeSisu refers to extraordinary internal strength in the face of adversities. Although originally a Finnish concept, it can be a universally useful concept for studying managerial well-being and performance during difficult or even emergency periods. Previous research on sisu categorizes it into beneficial and harmful sisu and suggests that these two dimensions of sisu are useful when studying determination and resoluteness in crisis situations. This study applies the concept of sisu to examine managers’ well-being in times of crisis.MethodologyInterviews were conducted with 15 managers in the hotel, manufacturing and retail industries in Finland.ResultsThe beneficial effects of sisu seem to dissolve when it is used too often. The study also highlighted the paradoxical tension involved in the decision to stop or continue actions in a difficult situation and contributes to sisu research by discussing collective sisu.ConclusionThe results of this study suggest that beneficial sisu helps to overcome adversity, while harmful sisu causes distortions in thinking that are detrimental to managers. Understanding one’s own tendency towards beneficial or harmful sisu in difficult situations can help in managerial work. Collective sisu is an excellent resource for overcoming difficult situations in workplaces.

Utilising Gamification to Enhance Ambition on Digital Platforms: An Examination of Faculty Members Perspectives in Times of Crisis

The utilization of gamification-based digital platforms has been demonstrated to significantly contribute to the optimization of the learning process, fostering robust motivations and a sustained inclination to engage in further learning. Ambition, as a variable, is of significant importance for learners in maintaining their engagement with the educational process during periods of emergency. Nevertheless, despite the significance of this topic, there is a notable scarcity of qualitative studies that have investigated the relationship between gamification-based platforms and ambition. Given the frequency of educational emergencies, it is imperative that scholarly research is conducted to determine how gamification-based platforms can be utilized to promote ambition. This is consistent with the widespread use of gamification as the primary tool for learning in both normal and emergency situations. This study employs a qualitative approach, utilizing a phenomenological methodology to conduct a series of in-depth semi-structured interviews with twelve faculty members who are recognized as experts in the field of gamification and digital platforms. The results identified the most important roles of gamification-based platforms in enhancing ambition, which were represented in four main roles: motivation, planning and goal setting, monitoring, and social interactions. Collectively, these roles enhance ambition. The research recommended that gamification incentives such as points, badges, and chest plates should be employed to enhance users' desire to learn during any educational emergency.

The Pandemic, Protests, and Perceptions of the Police: How COVID-19 and the Murder of George Floyd Affected Public Trust in the Chicago Police Department

This study examines whether views of the police in Chicago were altered by the pandemic and the release of a video depicting George Floyd's murder. Panel data analysis is used to examine over six years of monthly survey data tabulated by the Chicago Police Department's private partner and made available to the public through an open data portal. The study finds evidence of a short-lived rally to the flag effect during the first stage of the pandemic, but only among White and Hispanic survey respondents. Views of the police decreased significantly for Black respondents during a later stage of the pandemic. Contrary to expectations, the survey data show an immediate improvement in public views of the police by Black and Hispanic respondents after the George Floyd video was released. Consistent with expectations, a steady month-by-month drop in those views then started before trending more positive in 2022 and extending through the end of the study period. The implications of the findings, in periods of emergency and otherwise, are also explored.

Distribution and life cycles of mayflies Andesiops torrens (Lugo-Ortiz and McCafferty, 1999) and Andesiops peruvianus (Ulmer, 1920) (Ephemeroptera: Baetidae): importance for environmental monitoring

Streams are suffering multiple disturbances worldwide, directly threatening biodiversity. Studying species in minimally disturbed streams will help to understand ecological patterns before they are altered by humans. The distribution and life cycles of the mayflies Andesiops torrens (Lugo-Ortiz and McCafferty, 1999) and Andesiops peruvianus (Ulmer, 1920) were investigated in a perennial Mediterranean coastal stream of Chile (Nonguén) from September, 2017 to August, 2018. Andesiops peruvianus had higher abundance throughout the year with 29.6 to 1117.4 ind/m2, whereas A. torrens had from 33.3 to 481ind/m2. Both species have a univoltine seasonal life cycle, with emergence in late winter and early spring; A. torrens larvae mature from September to October, and A. peruvianus larvae from August to October. A significant correlation was found between density of species and water temperature, precipitation, water velocity and discharge. Our data found some differences in emergence periods compared to previous studies on both species in other streams from South America. We report on the species distribution and argue the importance of life cycles in freshwater biomonitoring, highlighting the biological traits of Andesiops Lugo-Ortiz and McCafferty, 1999 that could prove useful for biomonitoring purposes.

PERFIL EPIDEMIOLÓGICO DA HANSENÍASE NO BRASIL NO CONTEXTO DA PANDEMIA DO COVID-19: UMA REVISÃO BIBLIOGRÁFICA INTEGRATIVA

Objective: to analyze the epidemiological profile of leprosy during the pandemic, as well as to identify the challenges faced in the diagnosis and treatment of this chronic disease. Methodology: this study explored the impact of the COVID-19 pandemic on leprosy in Brazil through an integrative literature review. The review was conducted through a well-defined process, following a guiding question. Searches were conducted in several databases, including MEDLINE, LILACS, Scielo, using descriptors related to leprosy and COVID-19. Results: the COVID-19 pandemic significantly affected leprosy in Brazil. A reduction in case counts was observed, in addition to the suspension of health services and barriers in access to treatments. Conclusion: this research provided a more detailed view of how COVID-19 affected leprosy in Brazil and highlighted important aspects that require attention. However, the implications of this work for the field of health and nursing are evident, offering a basis for improving the treatment of leprosy and other public health issues during periods of emergency.

Resilience-oriented scheduling of DC microgrid considering participation in the automatic frequency regulation reserves market

Maintaining uninterrupted supply to critical loads within a DC microgrid (DCμG) with minimal curtailment of flexible and moderate loads after an extreme event is challenging. In this context, this paper proposes a resilience-oriented energy management scheme (EMS) for an electricity-Hydrogen (H2) DCμG considering participation of the DCμG in the automatic frequency restoration reserve (aFRR) market. The DCμG works in grid-connected mode during normal operation and switches to island operation after an extreme event to minimize damage propagation. DCμG network and equipment-level operating constraints are formulated incorporating the effect of aFRR market participation and coordinated with the EMS scheme. The problem is formulated in the convex model predictive control (MPC) framework using a receding horizon, in which three operating periods, normal, proactive preparation, and emergency, are considered. Economical operation is achieved during normal operation, while during proactive preparation, the DCμG operator (DCμGO) economically prepares for the imminent extreme event to meet the criticality criterion of resilient operation. The emergency period starts after the extreme event, and the objective is to supply all critical loads with minimal curtailment of moderate and flexible demands. We have used a Copula-embedded Monte Carlo Simulation (MCS) framework for modelling the uncertainty of input random variable (RV)s and their correlations. Simulation studies validate the veracity of the proposed approach on a six-bus test DCμG system. Simulation results indicate that participation in the aFRR market increases the profit by ∼30.5%, and resilience-oriented scheduling reduces curtailment costs by ∼16.72% during emergency periods.

Development of DUS testing guidelines of Artemisia argyi

Artemisia argyi is a perennial herbaceous herb of the Artemisia family, with leaves for medical use. However, the germplasm of A. argyi is seriously unclear and mixed during production, and it is urgent to protect new varieties of A. argyi. The distinctness, uniformity, and stability(DUS) testing of the new varieties of plants is the basis for the protection of new varieties of plants, and the development of the DUS testing guidelines is the technical basis for DUS testing. To develop the DUS testing guidelines of A. argyi, A. argyi of 100 germplasm was used as the research objects, and their agronomic and medicinal quality characters were observed and measured during six growth stages, and each character was graded and described. A total of 53 test characters were determined, including 19 characters that must be tested; there were four plant characters, two rhizome characters, five stem characters, three branching characters, 29 leaf characters, three floral characters, five medicinal quality characters, and two other characters. It also involved 16 quality characters, 22 quantitative characters, and 15 pseudo-quantitative characters. Seven grouping characters were determined from 53 characters, including "emergence period" "plant-plant type" "branching-primary branching site" "stem-color" "middle leaf-number of leaf splits" "budding period", and "plant-height". By searching for standard characters, 16 standard varieties were ultimately determined. The preparation of this guideline was of great significance for the review and protection of new A. argyi varieties, the protection of breeders' rights, and the promotion of the development of A. argyi industry.

Effect of High Nighttime Temperatures on Growth, Yield, and Quality of Two Wheat Cultivars During the Whole Growth Period.

It is a consensus that Earth's climate has been warming. The impact of global warming is asymmetric, that is, there is more substantial warming in the daily minimum surface air temperature and lower warming in the maximum surface air temperature. Previous studies have reported diurnal temperature differences greatly affecting winter wheat yield. However, only a few studies have investigated the impact of global warming on the growth and yield of winter wheat, yet the influence of night warming on quality has not been deeply evaluated. In this study, two wheat cultivars were used as materials: Jimai 44 (JM44) with strong gluten and Jimai 22 (JM22) with medium gluten, to explore the effects of high nighttime temperatures (HNTs) on the growth, yield, and quality of wheat. The results show that HNTs significantly shortened seedling emergence and anthesis periods in both cultivars compared with ambient temperatures (ATs). In addition, HNTs increased the respiration rate at anthesis and grain-filling stages, impeding wheat pollination and grain maturity. HNTs also accelerated leaf senescence and increased the number of sterile spikelets and plant height, but decreased the effective tiller number, the number of spikes per unit area, and grains per spike. As a result, the grain yield of JM22 and JM44 was decreased by 24.6% and 21.2%, respectively. Moreover, HNTs negatively influenced the flour quality of the two wheat cultivars. The current findings provide new insights into the effects of HNTs on the growth, development, yield, and quality of different wheat genotypes during the whole growth period.

A quantitative investigation in a territory of Italy on citizens' attitudes towards medicines through the COVID-19 pandemic: the importance of possible indirect effects caused by the pandemic.

The COVID-19 pandemic has greatly influenced many aspects of everyday life, particularly that of the general population health. In order to better understand the potential impacts of the COVID-19 pandemic on people's attitudes toward medicines use, a quantitative investigation was conducted in a territory of Sardinia region, Italy. Stratification of the random multilevel population sample was based on gender, age range, and territory. The methodological strategy to verify the potential approach changes towards medicines due to the COVID-19 pandemic consisted of oral interviews with adult citizens and unrecognizability preservation. Investigation, also supported by a study completed before the insurgence of the pandemic about taking medicines, interrupting treatments without consulting, and reading the information leaflet, allowed to explore citizens' attitudes before and during pandemic, and changing. The most relevant findings are the tendency towards a higher occurrence of self-interruption of treatments and an increased interest in the information leaflet (package leaflet), but not an increased self-administration of medicines. These results indicate new indirect effects of the COVID-19 pandemic that could exert an additional impact on the state of citizens' health and health systems. The study, with reference to prophylactic medical treatments and based on some considerations concerning the pandemic from its insurgence to today, also provides solutions for related problems for the present or future periods of health emergencies.

The Impact of Political Interference on the Judiciary: India Vs. Pakistan

This paper investigates the significant effects of political interference on the judiciary in India and Pakistan, two countries with a common colonial history but differing paths since gaining independence. The judiciary serves as a fundamental pillar of democratic governance, designed to function independently while protecting the rule of law and upholding constitutional rights. Nevertheless, in both nations, political influences have notably affected judicial operations, compromised judicial independence and eroding public confidence. Through a comparative examination, this study highlights important historical moments, landmark rulings, and constitutional frameworks that demonstrate the degree and nature of political interference within both judicial systems. In India, such interference has emerged through executive control over judicial appointments and crises, notably during the Emergency period from 1975 to 1977. In contrast, Pakistan's judiciary has experienced direct meddling from military governments and political authorities, frequently rationalized by the contentious Doctrine of Necessity. Additionally, the paper investigates how the judiciary has responded to these interferences, including instances of judicial activism and civil society initiatives that promote judicial independence, such as the Lawyers' Movement in Pakistan. Ultimately, this research emphasizes the urgent need for strong protections to ensure judicial independence, bolster public trust in the judiciary, and maintain democratic principles in both countries. By highlighting the comparative experiences of India and Pakistan, this study aims to enrich the broader discussion on judicial independence in South Asia.

Exploring the GP-patient relationship: a historical narration

The relationship between patients and their doctor is a fundamental concept—particularly within general practice. Many patients and general practitioners (GPs) have a ‘common-sense’ recognition of the interpersonal connection, usually over...

The Impact of the COVID-19 Pandemic on the Stroke Unit of a Portuguese Community Hospital.

It is essential to understand the consequences of the COVID-19 pandemic on stroke care, contemplating the potential health and economic consequences of missed diagnoses or treatments. This study examined the pandemic's effects on stroke epidemiology, clinical characteristics, and treatment in a hospital setting, comparing data from March 2020 to February 2021 with the homologous period the previous year. A secondary analysis focused on the state of emergency periods (March 19 to May 2 and November 6 to February 28). The sample included 730 stroke admissions, with 343 during the pandemic. There was a 24.75% reduction in the average daily occupancy rate (p<0.001) and a slight decrease in average daily admissions, especially in June from 132% to 74% (p=0.01). There was a moderate negative correlation between the number of COVID-19 cases and occupancy rates in January (r{s}=-0.422, p=0.01) and February (r{s}=-0.532, p=0.01). Admissions for ischemic stroke decreased by 7.2% (p=0.026), particularly mild events, with a 6.8% decrease in lacunar syndromes (p=0.048). Mechanical thrombectomy (MT) increased by 5.4% (p=0.046), while intravenous thrombolysis (IVT) decreased by 2.8% (p=0.048), especially in severe stroke cases (-21.4%, p=0.001). The pandemic period documented more MT procedures than IVT. Hemorrhagic stroke admissions increased by 6.7% (p=0.01). The analysis suggests a reduction in mild ischemic stroke admissions and fewer patients undergoing IVT for severe strokes during the pandemic. Broader-scale studies are necessary to confirm these findings. Considering the documented decline in diagnosis and treatment, minimizing the impact on stroke care during potential sanitary crises is paramount.

Impact of the COVID-19 Prioritization Recommendations on Pathological Stages of Urologic Malignancies: A Real-World Analysis at a High-Volume Referral Institution

Background: In response to the COVID-19 pandemic, the European Association of Urology (EAU) Guidelines defined priority groups to guide the prioritization of surgery for urological malignancies. The objective of this study was to evaluate the impact of the COVID-19 prioritization recommendations on tumor pathological characteristics in a real-world setting at our academic referral institution. Methods: We compared baseline and pathological tumor features of all patients with urological malignancies treated during the pandemic period (2020–2021) versus in the post-pandemic period (2022–2023). Our institution adhered to the international recommendations and prioritized those cases defined as “high-risk”. Results: Data from 9196 patients treated for urological malignancies were reviewed and grouped according to period of surgery (4401 in the pandemic period vs. 4785 in the post-pandemic period). The overall number of surgical procedures was comparable for all diseases except for the number of radical prostatectomies (1117 vs. 1405; p = 0.03) and partial nephrectomies (609 vs. 759; p = 0.02), which were significantly lower in the pandemic period. Regarding tumor pathological features, none of the recorded variables were found to differ according to period of surgery, including disease stage, tumor grading, presence of necrosis, lymphovascular invasion, and histological variants. Conclusions: A correct policy of prioritization of oncological pathologies during emergency periods and a centralization of oncological cases in reference centers reduce the possible risk of worsening cancer disease features related to the reorganization of healthcare resources.

Real-time hazard assessment of maize based on the chilling injury process —— Using a standard curve to establish a daily cumulative assessment method

Cold damage caused by low temperatures is known as chilling injury (CI), and it has consistently been one of the primary meteorological disasters affecting maize. With ongoing global climate change, the issue of chilling injury is becoming more prominent, exhibiting new characteristics and presenting new challenges. Consequently, understanding the disaster process and conducting a more refined real-time chilling injury identification have become significant challenges. In this study, we divided maize planting areas into seven maturity types based on the accumulated temperature, constructed a standard curve of the daily accumulated temperature from 1991 to 2020, proposed real-time identification indicators based on the CI process, and developed a real-time CI hazard assessment model. The results indicated that the model can capture independent CI events and rapidly determine the location, intensity, duration and scope of CIs, thereby providing a basis for accurately understanding the impact of chilling injury and taking timely countermeasures. The combination of accumulated temperature standard curves for seven maturity types of maize and the CI curve was used to construct the CI daily scale identification indicator, ΔEAT. Judgment thresholds for the CI identification indicators at various maturity levels were obtained by correlating them with historical disaster data. The frequency and intensity of maize CI gradually increased from the extremely late-maturing zone to the extremely early-maturing zone, with the seeding and emergence periods being the peak periods for CI. The spatiotemporal evolution characteristics of the three different degrees of CI events in 1992, 2004, and 2017 were consistent with the historical disaster records. Northeastern Inner Mongolia and most of Heilongjiang were found to be high-hazard areas for maize CIs. The constructed daily CI identification indicators can accurately and rapidly identify maize CIs, providing practical and targeted guidance for combating these injuries.